Question

4. An angle is 40° more than its supplementary angle. Find the angle.
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Answer 1

Answer:

Let the supplement angle be x. Therefore the measure of the bigger angle is x+40. Since the sum of supplementary angles add up to 180∘, we get:

x+x+40=180

2x+40=180

2x=140

x=70

Answer 2

Answer:

Supplementary angles sum to 180 degrees. Let our angle be A. Then A=40+(180−A)=220−A⇒2A=220⇒A=110 . So our angle is 110 degrees, and its supplement is 70 degrees